Camera objective holder mount



Aug. 28, 1945. G. BAER 2,383,439

CAMERA OBJECTIVE HOLDER MOUNT Fild Feb. 26, 1944 Patented Aug. 28 1945 t v A j v UNITED STATES PATENT OFFICE CAMERA OBJECTIVE 1101mm MOUNT Georges Baer, Paudex-Lausanne, Switzerland Application February 26, 1944, Serial No. 524,050 In Germany May 17, 1943 10 Claims. (Cl. 88-57) The object of the present invention is a camor simply balls II with a radial spring shown in era objective holder mount in which the objec- Fig. 5. tive holder tube can slide in the camera casing The operation of this objective holder mount is between two positions for operation and rest asiollows: determined by stops. This mount is character- At rest, the objective holder tube 6 is thrust ized by at least oneelastic arresting member fully inside the camera, so that the inner surface mounted in one of the elements objective holder of its front flange bears on the outer surface of tube and casing, and acting on a conical surface the ring 4. provided on the other element, in such a way as For using the c 1 pulls the Objective to exert on the objective holder tube an axial lo holder tube 6 outwards, until the sp 30 thrust tending to keep it against the stop deterc s in the r v 11, w e y th prin mining the operating position, presses upon the conical side of the groove, so The attached drawing re re t by way 1' that the objective holder tubeis maintained at example, an embodiment of the invention, the end oiits travel, i. e., with its rear flange Fig. 1 is a general view showing the position hearing gainst the inner surface I of the ring of the objective holder mount in the camera, 4. In this way, the position of the objective is Fig. 2 is an axial section of the mount and Figs, secured with Pre i ion.

8 to 5 show alternative constructions of a detail. when it is required to e the jective old- I In the embodi t r t t obj tiv or tube right out of the camera, it suflices to exholder mount comprises'a first ring I Screwed 0 ert on the former a slightly stronger outward by its external flange on the rim of an aperture Pull, n er o ompe t e Sp 3 to open 5111- cut in the wall 2 1' th a casing T1115 first, flciently to let pass the ring 4. When one puts ring presents a circular inner groove of rectam again the objective holder tube in position in the gular cross-section, both sides of which are discamera, the Spring 3 es automatically that posed at right angle withthe axis 01' the objecthe objective comes at the exact distance, by ti I t groove is fitted ,v spring 3 made compelling the ring 4 to set itself into the first of a steel wire loop of circular cross-section. The Ting L by the actmh 0f the Spring 3 0n the Coniinn dia t of t sprmg is slightly inf i r cal side of the outer groove 5 of the ring 4. The t that of th first ring latter presents also a conical surface 8 designed A second ring 4 i mounted t slight n to open the spring 3 when the ring 4 is being tion in the first one and comes to abut against thrust the first ring it ut face by means of an external flange The advantage of this objective holder mount Thi ri present an outer circular groove 5 f is thus to'permit a rapid manipulation of the obtrapezoidal cross-section, the inner side of which .iective holder tube, and to insure at the same is c m 1 e" mchned in respect f the axis of time that the distance of the objective be accuthe objective, whilst the opposite side is disposed rately maihamedat right angle with the axis of the objective. In. In Order to make sure that the i e loop spring temglly, t second ring presents a groove simh cooperating with the objective holder tube may 1mt th t of the first ring with a spring like not scratch its surface, one can cut in the inner the spring I but weaker. This spring engages into 40 of the Wire 1009 Spring 8 Circular groove a groove to provided on the objective holder tube slgned to receive Sm00th pad of hon-metallic i; thi r v 1 shnhar to the groove 5 but db material or of soft metal as indicated at ill in rected in the opposite direction along the axis of v the objective, that is to say, with the conical side What I claim isi towards outside the camera. 1. In a camera objective holder mount in which The objective holder tube 6 is also fitted with the objective holder tube can slide axially in the slight friction in the ring 4 and presents a rear camera casing between two positions for operation flange i t t abut against the inner face and rest determined by stops, in combination, an of this ring in a recess 1 provided t th t effe t objective holder element, a casing element, stop In a simpler construction, the ring 4 can be means determining the operating p i n of the mounted directly in the wall 2 of the camera. holder l least One elastic a res ing mem- The springs 3 and 311 can be of rectangular or be! mounted in one Of the elements and a 0011169,]. square cross-section with at least one rounded Surface provided n t o e e c actin or bevelled angle 3b. One can also provide rawi h-the arresting member in such a way as to dial spring pressed pushersdc as showninFig. 4, to exert on the objective holder element an axial thrust tending to keep it against the stop means.

2. In a camera objective holder mount in which the objective holder tube can slide axially between two positions for operation and rest, a casing element, a ring element receiving said tube, stop means, the ring element being movable axially into the casing element as far'as an operating position determined by said stop means, a conical surface on one of the elements, at least one elastic arresting member carried by the other element and acting on said conical surface in such a way as to exert on the ring element an axial thrust tending to keep it against the stop means determining the operating position.

3. In a camera objective holder mount according to claim 1, the fact that the elastic arresting member comprises a wire loop spring mounted in a circular groove cut in one of the elements and acting on the conical side surface of a circular groove cut in the other element.

4. In a camera objective holder mount according to claim 1, the fact that the elastic arresting member comprises a wire loop spring mounted in a circular groove cut in one of the elements and acting on the conical side surface of a circular groove cut in the other element, the wire loop spring being of circular cross-section.

5. In a camera objective holder mount according to claim 1, the fact that the elastic arresting member comprises awire loop spring mounted in a circular groove cut in one o! the elements and acting on the conical side surface 01' a circular groove cut in the other element, the wire loop spring being of quadrangular cross-section with at least one rounded mile.

6. In a camera objective holder mount according to claim 1, the fact that the elastic arresting member comprises a wire loop spring mounted in a circular groove cut in one of the elements and acting on the conical side surface of a circular groove cut in the other element, the wire loop spring being oi quadrangular cross-secti0n with at least one bevelled angle.

7. In a camera objective holder mount according to claim 1, the fact that the elastic arresting member comprises a wire loop spring mounted in a circular groove cut in one oi the elements and acting on the conical side surface of a circular groove cut in the other element, the wire loop spring presenting an inner groove containing a smooth non-metallic pad.

8. In a camera objective holder mount according to claim 1, the fact that the elastic arresting member comprises a wire loop spring mounted in a circular groove cut in one of the elements and acting on the conical side surface of a circular groove cut in the other element, the wire loop spring presenting an inner groove containing a smooth pad of soft metal.

9. In a camera objective holder mount according to claim 1, the fact that the elastic arresting member comprises at least one radial spring pusher.

10. In a camera obiective holder mount according to claim 1, the fact that the elastic arresting member comprises at least one ball with radial spring.

GEORGES BAER. 

